Stenciling-machine.



Patented Nov. 22,1910.

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ALEXANDER J". SMITH, OF STAMFOR-D, CONNECTICUT, ASSIGNOR TO UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

STENCILINGr-MACHTNE.

Speccation of Letters Patent.

Patented Nov. 22, 1910.

Application filed October 9, 1909. Serial No. 521,919.

To all whom 'it may concern:

Be it known that l, ALEXANDER J. SMITH, a citizen of the United States, residing in Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Stenciling- Machines, of which the following is a specification.

rlhis invention relates tol stenciling machines, and is in the nature of an improvement upon the devices shown in application No. 513,377 led August 18, 1909. In said application a detachable cylindrical ink fountain is provided within the stencil cylinder, being attached at its end to the inner end of the cylinder, and also having feed openings for the ink, said openings closable at the will of the operator.

The principal object of the present invention is to improve the means for mounting the ink fountain Within the stencil cylinder, particularly with a view to simplicity of construction and ease of detaching and attaching the same. 1 provide within the stencil cylinder' a long stud or axle, and the fountain is slipped onto this stud and secured by a releasable catch.

Another object of the invention is to improve and simplify the means for controlling the feed of inlr from the fountain. For this purpose l provide a cylindrical multiplex valve, which is slidable endwise to and fro, to open or close the ink feeding perforations in the fountain; said valve being housed in a tube contained in the ink fountain, and having suitable perforations for the passage of ink.

Other features and advantages will hereinafter appear.

1n the accompanying drawings, Figure 1 is a perspective sectional view of a stencil cylinder provided with the present improvements. Fig. 2 is a sectional view to illustrate a portion of the ink-feeding valve, etc. Fig. 3 is a cross section of the fountain. Fig. l is an elevation of the outer end of fountain. Fig. 5 is a longitudinal central section of the fountain.

A stencil cylinder 1, having throughout perforations 2, is usually mounted at one end by means of a screw stud or journal 3 upon a post L1, forming part of the framework; the other end of the cylinder being usually supported upon rolls (not shown). The stenciling ink is supplied in a long cylindrical box or fountain 7. The ink may be sold in this fountain ready to slip in place upon the stencil cylinder. The ink fountain is slipped upon a central stud or axle 8, the end of which is inserted in a hub 9 of the stencil cylinder 1. A nut 10, threaded upon the projecting end of the stud 8, draws a shoulder 11 on said stud against the end of the hub 9, thus giving the stud a firm mounting. The screw journal 3 is threaded into the end of said stud 8, and may be easily withdrawn to permit detachment of the stencil cylinder from the machine.

The ink fountain 7 is provided with a central tube or hollow core 12, which slips loosely upon the stud 8, the latter extending preferably the full length of the fountain, and having a spring latch 13 to catch over the end of the ink fountain (Fig. 5) to secure the latter against accidental detachment. It will be understood that when it is desired to take the fountain out, it is only necessary to depress the latch 13 to release the fountain, which may then be slipped o from the stud 8. In replacing the fountain it is only necessary to slip it onto the stud 8 as far as it will go.

The outer end or head 14 of the ink fountain may be permanently secured to or formed upon the cylindrical body thereof; and the inner head may be in the form of a cap 15 removable for convenience in inspecting and cleaning the interior of the fountain. Said cap may have a hub 16 threaded upon the inner end of the tubular core 12; a soft washer 17 being pressed by the hub 1G against an annular shoulder 18 on the core 12, to prevent leakage of ink at this joint'. A soft dislr or 4gasket 19 may be forced by the cap 15 against the end of the box 7 to prevent leakage.

rFhe feed of the ink from the cylinder is controlled by a. valve rod 20 having a button 21 on its outer end and fitting in a tubular housing 22 within the ink fountain and extending from end to end thereof; the outer head 14- of the fountain being perforated and the rod 20 projecting therefrom. lnk fiows from the fountain into the tubular housing 22 through pairs of perforations 23 the rod lis pushed in as far as it willy go, the

grooves' 25 `are carried entirely out of register with the openings 23, 24, said openings being all closed by the uncut portions of the multiple valve rod 20. By adjusting said rod to ldifferent positions, the ink may be caused to flow either vfreely or slowly. The stop 26 is in the form of fa screw to permit its removal, so that the multiple valve rod may be withdrawn fromV the fountain. If it is desired to 'cause the ink to iiow more freely, the Y'operator may work back and forth a handle 28 provided upon the 'end of a rod 29, which projects through a stufling boX 30, and carries at its inner end a piston 3l having a number of perforations 32 and cut away at 88 to clear the valve housing 22. This piston may also be cut away on its edge or si'de at 34, to clear an inwardly projecting supply nipple 35, and also to reduce the area of the piston, so that it may be moved easily.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim: y

l. The combination witha revoluble stencil cylinder, of an interior central stud projecting from one end of the cylinder and having at said end means whereby it is detachably secured, and an inl; fountain upon said stud, the latter having at its projecting end releasable means for securing the ink-fountain; the latter extending for substantially the entire length of the stencil cylinder.

2. The combination with a revolublestencil cylinder and having at one end an interior central stud, of a closed ink-fountain having a central core whereby it is mounted upon said stud, said stud having a shoulder to bear against a hub provided upon the cylinder, and a nut threaded upon the stud to draw the shoulder against the hub.

3. The combination with a revoluble stencil cylinder having an interior central stud, of a closed ink-fountain having a central core whereby it is mounted upon said stud, said stud having at its inner end a shoulder to bear against a hub provided upon the cylinder, `and a nut threaded upon the stud to draw the shoulder against the hub; said stud having at its inner end a threaded socket to receive the threaded end of a journal-screw.

' ALEXANDER J. SMITH.

Witnesses:

JOI-ING. SEIFERT, K. FRANKFORT. 

